Grinding-wheel carrier for horizontal surface-grinding machines



T. LUMSDEN,

GRINDING WHEEL CARRIER FOR HORIZONTAL SURFACE GRINDING MACHINES..

APPLICATION FILED DEC. l0, I920.

1,373,193.. Patented Mar. 29, 1921.

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INVENTOR: 6 j ai m/um/y/ 4M @Wzm UNITED. sures PATENT OFFICE;

mnomiis LUMSDEN, or emrnsnmn, I ENGLAND.

GRINDING-WHEEL CARRIER FOR HORIZONTAL SURFACE-GRIND ING MACEINE To aZZ whom it may, concern:

Be it known that I, THOMAS LUMSDEN, a

subject of the King of Great Britain and Ireland, residing at Gateshead, in the county of Durham, England, have invented new, and useful Improvements in Grinding-Wheel Carriers for Horizontal Surface-Grinding Machines, of which the following is a specification. 7

My invention relates to grinding wheel carriers for horizontal surface grinding ma chines of the "kind wherein the grinding wheel (or wheels) is moved across the work, and either the wheel is lowered and raised to move it into and out of contact with the surface of the ,work, or the work is raised and lowered to move it into and out of contact with the wheel, The grinding Wheel carrier of the present invention is, for ex ample, applicable to horizontal surface grinding machines of the planer type wherein the wheel carrier is vertically adjustable and is supported by a housing or upright at each side of the reciprocating work table; to machines of the ring grinder type wherein the wheel carrier is not vertically adjustable and the work is carried by a revolving table which can be raised and lowered to move the work into and out of contact withv sliding member within the cross rail, rotary adjustment of said ram lowering and raising the wheel to move it into and out of contact with the surface of the work.

In the accompanying drawings, Figure l is a central vertical section of one construction of grinding wheel carrier in accordance with my invention; Fig. 2 is a cross section thereof drawn to a larger scale; and Fig. 3 is a similar view to Fig. 1 illustrating a modification.

Specification of Letters Patent.

Patented Mar. 29, 1921.

Application fi1edDecember 10, 1920. Serial No. 429,740.

Referring to the drawings, in the construction lllustrated n Figs. 1 and 2, the rind ingyvheel a is supported by acarriei' comprising across rail Z) bored out cylindrically and provided with aninternal axially slidlng PlShOlt-llk member 6. The sliding member e carries one end of a 12111'1 f, the axis of which 1s parallel to but is preferably eccentr c from the axis of theslidin member 6 and cross ra1l b. The wheel spindle q is mounted in bearings h disposed eecentrically 1n S2L1tl1'tm', tll(5 grinding wheel a bein surrounded and directly supported by th; slid- 1ng member eyand the cross rail b which are cut away at 7 to uncover the lower portion of the periphery of the wheel. The end of the ram farther from the wheel a; is supported by a fixed bearing [if within and carried thetcrossrail 5 through which the ram 1s freeto slide 'The wheel spindle g is rotated by a belt-driven pulley m keyed on the end of the spindle g opposite to the I Wheel a.

Means, such as a worm wheel 39 engaging a worm sector 9 on the ram f and mounted on a spindle 7' carried by the sliding member e and provided with a screw wheel sengaging a complementary screw wheel 6 on a shaft a rotatable by a handwheel o, are provided for rotatively adjusting the ram f to lower and raise the wheel a relatively to the axis of the cross rail 6 and so move the wheel into and out of contact with work.

Where the cross traverse of the wheel is considerable, the ram 7 may, as shown in Fig. 3, be short in length and wholly sup ported by the sliding member 6, the pulley end of the spindle 9 being eccentrically mounted in similar fashion in a carrier a in the fixed bearing is carried by the cross rail Z), in which case the spindle 9 slides through the belt pulley m but is keyed thereto. In this construction, both the ram f and the carrier n are provided with worm sectors 9 each of which is engaged by a worm wheel 39 on a shaft r. provided with a screw wheel 8 engaged by a complementary screw wheel t, both wheels t being mounted on the shaft to so that both the ram and the carrier at can be rotatively adjusted equally and simultaneously by rotating the shaft u.

The screw wheels t are keyed to the shaft u but are free to slide thereon to suit the travel of the sliding member 6.

the surface of the Any convenient known means may be provided for reciprocating the sliding member 6 axially within the cross rail 1) to give crosstraversing motion to the wheel a. In the construction illustrated, the sliding member c is provided with a nut an engaging a threaded shaft 00 restrained from endwise movement,-; said shaft being rotatable through gear Wheel y by a handwheel 2.

My invention is applicable to grinding wheel carriers for horizontal surface grinding machines having a plurality of grinding Wheels as well as to carriers for machines having a single Wheel.

VVhat I'claim and desire to secure by Let- Y ters Patent is v 1. VA grinding wheel carrier for a horizontal surface grinding machine comprising a eylmdrlcal cross rail, an axially sliding -member mounted therewithin, means for 'freciprocating said member, a spindle supported by said sliding member, a grinding wheel mounted on said spindle, and means for rotating said spindle, said cross rail and said sliding member partially surrounding 'sald grmding wheel.

2. Av grinding Wheel carrier for a hor1- zontal surface grindingmachine comprising a eylind-rlcal cross rail, an axially shding member mounted therewithin, means for reciprocating said member, a ram mounted for rotation in said sliding member, a spindle eccentrieally mounted in said ram, means for angularly adjusting said ram to lower and raise said spindle relatively to the axis of said cross rail, a grinding wheel mounted on said spindle, and means for rotating said spindle, said cross rail and said sliding me1nber partially surrounding said grinding wheel.

3. A grinding wheel carrier for a horizontal surface grinding machine comprising a cylindrieal cross rail, an axially sliding member mounted therewithin, means for reciprocating said member, a ram mounted for rotation in said sliding member, a carrier member mounted for rotation in said cross rail, an .eccentrically mounted spindle one end of which is carried by said ram and the other end by said carrier member, means for simultaneously angularly adjusting said am and said carrier member to lower and raise said spindle relatively to the axis of said cross rail, a grinding wheel mounted on said spindle, and means for rotating said spindle, said cross rail and said sliding member partially surrounding said grinding wheel.

In testimony whereof I have signed my name to this specification.

THOMAS LUMSDEN. 

